Color
#27309b
#27309brgb(39, 48, 155)hsl(235, 60%, 38%)oklch(0.38 0.171 271.5)Colors that go with #27309b
Charcoal, Steel Blue and Blue lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #27309b: softer than #000 and cool enough to feel like part of the same palette.
Steel Blue #4682b4
analogousshippedSteel Blue is #27309b's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Blue #0000ff
shipped6 real palettes, including Procter & Gamble's brand system and CVS's brand system put Blue beside #27309b, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #27309b in 10 real palettes, including Walgreens's brand system and Pepsi's brand system, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #27309b: 8 real palettes, including Warbyparker's brand system and Unilever's brand system, as the accent.
Firebrick #b22222
shippedDesigners have shipped Firebrick with #27309b: 4 real palettes, including 3M's brand system and Nintendo's brand system, as the supporting colour.
Orange Red #ff4500
shippedOrange Red is paired with #27309b in 4 real palettes, including Tide's brand system and NASA's brand system, as the accent.
Red #ff0000
shippedRed is paired with #27309b in 4 real palettes, including Walgreens's brand system and 3M's brand system, as the supporting colour.
Real palettes that use #27309b
Tints & shades
Harmonies
Contrast
| #27309b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 10.59:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.98:1 | fail | fail | fail |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #27309b as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Fonts for this mood
#27309b reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
›analyze #27309b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/27309b-9e9cc4-df8d4e-241f2d-e9eef1?lock=0&style=vibrantWant the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.
Machine-readable: color.md